6. Two electric posts which are 54 m apart are to be re-installed along the left side of the Pili Drive. A 60 m long overhead power line is to be connected between the two posts. If the lowest point of the line is 20 m above the ground, how high on each post should the wire be attached? Also, determine the horizontal tension in the power line if the mass of wire per unit length is 1.2 kg/m. Use g 9.806 m/s2